Wed·Jan 14, 2015Wednesday·January 14, 2015

1. 01*

   Fluctuations of Conserved Quantities in High Energy Nuclear Collisions at RHIC

   Xiaofeng Luo🇨🇳

   Fluctuations of conserved quantities in heavy-ion collisions are used to probe the phase transition and the QCD critical point for the strongly interacting hot and dense nuclear matter. The STAR experiment has carried out moment analysis of net-proton (proxy for net-baryon (B)), net-kaon (proxy for net-strangeness (S)), and net-charge (Q). These measurements are important for understanding the quantum chromodynamics phase diagram. We present the analysis techniques used in the moment analysis by the STAR experiment and discuss the moments of net-proton and net-charge distributions from the first phase of the Beam Energy Scan program at the Relativistic Heavy Ion Collider.

   nucl-exhep-exhep-latnucl-thJ.Phys.Conf.Ser.(2015)·7 citations
2. 02*

   Frequency shifts in gravitational resonance spectroscopy

   S. Baeßler🇺🇸 · V.V. Nesvizhevsky🇫🇷 · G. Pignol🇫🇷 · K.V. Protasov🇫🇷 · D. Rebreyend🇫🇷 · E.A. Kupriyanova🇷🇺 · A.Yu. Voronin🇷🇺

   Quantum states of ultracold neutrons in the gravitational field are to be characterized through gravitational resonance spectroscopy. This paper discusses systematic effects that appear in the spectroscopic measurements. The discussed frequency shifts, which we call Stern-Gerlach shift, interference shift, and spectator state shift, appear in conceivable measurement schemes and have general importance. These shifts have to be taken into account in precision experiments.

   nucl-exquant-phPRD(2015)·12 citations
3. 03*

   The Majorana Demonstrator: A Search for Neutrinoless Double-beta Decay of 76Ge

   Majorana Collaboration: W. Xu🇺🇸 · N. Abgrall🇺🇸 · F. T. Avignone III🇺🇸 · A. S. Barabash🇷🇺 · F. E. Bertrand🇺🇸 · V. Brudanin🇷🇺 · M. Busch🇺🇸 · M. Buuck🇺🇸 · D. Byram🇺🇸 · A.S. Caldwell🇺🇸 · Y-D. Chan🇺🇸 · C. D. Christofferson🇺🇸 and 53 other authors

   Neutrinoless double-beta decay is a hypothesized process where in some even-even nuclei it might be possible for two neutrons to simultaneously decay into two protons and two electrons without emitting neutrinos. This is possible only if neutrinos are Majorana particles, i.e. fermions that are their own antiparticles. Neutrinos being Majorana particles would explicitly violate lepton number conservation, and might play a role in the matter-antimatter asymmetry in the universe. The observation of neutrinoless double-beta decay would also provide complementary information related to neutrino masses. The Majorana Collaboration is constructing the Majorana Demonstrator, a 40-kg modular germanium detector array, to search for the Neutrinoless double-beta decay of 76Ge and to demonstrate a background rate at or below 3 counts/(ROI-t-y) in the 4 keV region of interest (ROI) around the 2039 keV Q-value for 76Ge Neutrinoless double-beta decay. In this paper, we discuss the physics of neutrinoless double beta decay and then focus on the Majorana Demonstrator, including its design and approach to achieve ultra-low backgrounds and the status of the experiment.

   nucl-exphysics.ins-detJ.Phys.Conf.Ser.(2015)·20 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.